In "Scholar Walking in the Night" Lee Joon Ki finally showed his true colors. He had been trying to protect Lee Yoo Bi for 120 years. Finally, to continue protecting her, he showed his real sides.
On the 6th episode of MBC Wednesday/Thursday drama "Scholar Walking in the Night" (script Jang Hyun Joo, director Lee Sung Joon) broadcast on July 22nd, Kim Sung Yeol (played by Lee Joon Ki) ran across Kwi (played by Lee Soo Hyuk).
At that time, Sung Yeol realized that Yang Sun was in danger. He hid Yang Sun from Kwi. Nonetheless, Kwi didn't stop chasing after Yang Sun. This was his way of using her as prey.
In the end, Sung Yeol told Yang Sun, "Go to the dark village" advising her to go the place that he had used to live. Then, Kwi came to the scene, showing his true colors. At this, he started to show his real colors saying, "Come here" and enticed him.
Afterwards, Sung Yeol had shown his true colors for the first time in 120 years. Kwi was excited to see this and later only realized that he was enticed. With Sung Yeol's help, Yang Sun was able to successfully hide.